Machine for sawing arcuate segments



Aug. 24 1926 J. W. LEE

MACHINE FOR SAWING ARCUATE SEGMENTS 5 Sheets-Shet l Filed Sept 18. 1924 Snowdon d70/50 flee MW lrmmqv @lim i mg, 24, i926,

y 115mm@ J. W. LEE

MACHINE FOR SWING ARCUATE SEGMENTS Filed Sept. 18. 1924 5 Sheets-Sheet 2 MW bte-mmf Aug. 24,1926. 1,597,606

. J. w. LEE A MACHINE FOR SAWING ARCUTE SEGMENTS Filed sept. `la. 1924' 5 sheetssheet a Jaja ML MW Gemma@ J. W. I EE MACHINE FOR SAW'NG ARCUATE SEGMENTS Aug. 24, 1926.

s shets-sheet 4 Filed sept'. 18.' 192,4

bombon Aug. 24,1926., l .1597,606

J. W.`L.EE

MACHINE 'FOR SAWING ARCUATE SEGMENTS Filed Sept. 18, 1924 5 Smets-Sheet 5 n oil Patented Aue. Z4, 19.9.36.

narran srAras JOI-IN W. LEE, OF DAYTON, OHIO, ASS-IGNOR ArENT To rimY INLAND MANUFACTURING CoM- MACHINE FOR SAVJING AROUATE SEGMENTS.

Application inea september 1s, 1924. serial No. 738,530.

rThis invention relates to an automatic machine for sawing out arcuate segments from fiat wood stock such as may be employed to form annular wooden articles such as steering wheel rims.

An object of this invention is to provide a machine which will saw out such segments much more rapidly, accurately and economically than has heretofore been done in any known manner.

A more specific object is to provide a machine having two concentrically mounted barrel saws against which the wood stock is adapted to pass thereby enabling' lboth, the outer peripheral cut and the inner peripheral cut to be made at one operation.

Other objects are to provide a clamping means which automatically grips the stock in all positions'where it may be moved or knocked out of place by the saw, that is, both during the cutting movement and the withdrawal movci'nent, and which automatically releases the cut off parts of the stock at the proper time to permit their removal and the feeding in of the stock for the succeeding cut.

Other objects are to provide automatic means for removing the cut-off parts of the stock at the proper time and permitting the proper feeding in of the stock for the succeeding cut.

A more general object is to arrange, all the moving parts of the machine so that they will operate in a simple and reliable manner and so that they may be all driven by a single power means.

Other objects and advantages of the present following description, reference being had to the accompanying drawings, wherein a preferred form of embodimentk of the present invention is clearly shown.

In the drawings:

Fig. 1 is a side elevation of a machine devsigned according to this invention for sawing out arcuate segments kfrom flat wood stock for making steering wheel rims;

Fig. 2 is a front elevation of said machine;

Fig. 3 is a view showing. the barrel sawv in section and an elevationof the" reciprocating table from the opposite side from that shown in Fig. 1, and illustrating in particular the spring-pressed clamping yoke for holding the wood stock fixed upon the invention will be apparent from theV table when adjacent the saw, and the camoperated intermittently rotatable stop means for removing the sawed 01T portions after each cut;

Fig. l is a plan View on an enlarged scale of the reciprocating table and illustrates in particular the spring-pressed clamping yoke straddling the inner wood stock, and the intermittently rotatable stop means for properly locating the stock when it is fed in and forl removing the sawed off portions after each cut;

OFFICL y' end of thepieceiof *i Fig. 5 is a section on line .5s-5 of Fig. 4 i and illustrates how the slotted clamping yoke clamps bothV the arcuate segment and.

the waste block firmly in position, upon the table luntil after they are withdrawn entirely clear ofthe concentric barrel saws. This figure also clearly illustrates the spring-pressed means for locatingthe in-` termittently rotatable .r'stop means) in one.

of its three positions i Fig.

6 shows on an enlarged scale the cumming means for rotating the stop means through 120 degrees 4for reciprocating table.

In the drawings, similar reference characters Vrefer to similar parts throughout the several views. Referring to Figs. 17 2, and 3,Y 10 designates the heavy frame casting upon which the 'moving parts are suitably mounted. The' two concentric barrel saws 11 and 12 an annular groove in the rotating head 13 by the wedging or gripping rings 14 and the bolts 15 as clearly shown in Fig. 3. The

each cycle of the are-rigidly mounted within .L

head 13 is fixed upon the vertical shaft 16 which is portion 17 of the frame 10 in suitable bearings such as clearly shown in Fig. 3. The saws are driven by the electric motor 18 through the belt 19 and pulleys 20, 21 .and guide pulleys 22.

vertically reciprocating table .25 is suitably mounted to movein vertical guides 26 rigidly mounted upon the machine frame.

, Thetable 25 is reciprocated by the shaft 27 having a crank 28 and the connecting rod 29 which is upper bearing pin 30 (see Figs. 2 and 3). This shaft.27 is by the electric motor 18 through a suitable clutch mechanism indicated at 31 in Fig. 1, a suitable reduction gearing enclosed in the housing 32 and the shaft coupling 33.

mounted upon an overhanging i connected to the table 25 at the driven at a suitable speed Since such clutch mechanisms and reduction gearing are well known in the art they will not be illustrated and described in detail herein. The manual lever 35 is located near the operators position and its movement controls the clutch 31 through the link 34 as will be clear from Fig. 1. By shifting.

atorof the machineinto the position shown.

in iig;

The reciprocating table 25 has krotatably mounted upon the inner end thereof and not Afar-below its top surface 41 a small horizon.

tal shaft 42 (see Figs. 4 and 5). This shaft 42 -has rigidlymountedthereupon two indeXing stop spiders 43 and 44 each having three projecting stop fingers 4 5 which are rotatable with shaft 42 within the clearance slots 46 and 47 inthe table 25, as clearly shown in Fig. 4. An indexing cam 50 is alsoA rigidly mounted upon shaft 42, preferably at the center of table 25, and is rotatablev within the clearance slot 48 in the table 25 (see Figs. 4 and.A 5). A springpressed plunger 51 rides upon the cam 50 when shaft 42 is intermittently rotated through approximately 120 degrees, ask will be Yhereinafter described, and locates cam 50 with one of the three flats thereon in a vertical position. When in this position each. of the two stop spiders 43 and 44 is in such position that 4each has a stop finger 45 projecting .vertically upward, as clearly shown in Fig. 5. Of course for each rotationof shaft 42 through 120 direction of thearrow shown in Fig. 5, the nexty succeeding pair of stop fingers .45 will Vbe in vertical position, and so on continuously. The two upwardly projecting iingers 45 serve as a stop means for limiting theinward thrust by the operator of the piece. of wood stock 40 at the two points 45, as clearly shown in Figs. 4 and 5.

The means for clampingithe wood stock 40 rigidly with the reciprocating table 25 during the sawing operation and until the saw is/withdrawn entirely clear of the saw cuts will now be described. This means comprises a vertically reeiprocable yoke 60 having two Shanks 61,. one on each side thereof,'said Shanks 61 being mounted in suitable guides 62 in the stationary machine frame 10 (see Figs. 1, 2. and 3). This yoke 60 is positioned normally immediatelyv under'v the barrel saws and above theV inner end of table 25 'as clearly shown, the downward yoke 60 being limited by a .surrounding the lower projecting vends oi degrees in the The outer saw 11 makes shoulder or collar. G3 on each of the twc shanks 61. The horizontal portion yand the legs of the yoke 60 are provided with an arcuate slot 65 which provides sufficient clearance for the movement therein of the :i

the, projected peripheries of the two barrelV saws, as clearly shown in Figs. 4 and 5. The yoke 60 is urged downwardly .at all ytimes by the two strong coil springs 64 the shanks 61, the tension of said springs `(i4 being suitably adjustable by means of the nuts 59 threaded upon the shanksv G1, all as clearly shown in Figs. 1 and 3.

The operation of yoke 60 is as follows: The operator places a piece of woodlstock 40 upon the top surface 41 of table 25 and slides the stock laterally until the leftedge thereof abuts the guide flange 24 and in- 'l wardly until its inner edge abuts the stop fingers 45, the stock40 being then in the position shown in Fig. 4. It is to be understood that the operator places the stock in this position while table 25 continues to have its vertical reciprocal movement. The table 25 moves up carrying stock 40 loosely thereupon for the distance ik (see Fig. 2) whereuopn the top surface of stock 40 engages the lower surface of the yoke 30 and from that point carries the yoke 60 upc wardly toward the saws Aagainst the resistance of the two compression springs G4. lt is thus seen that the stock 40 will be very firmly clamped in its proper position by' the yoke 60 just before the saws 11 and 12 engage the stock. As previously described. the yoke 60V clears both saws 11 and 12 and hence the stock 40 is engaged by they two saws upon its further upward movement.

the outer Vperipheral cut and the inner saw 12 makes the inner peripheral cut of the arcuate segment 70. The block 71 eut off the inner end of the stock by saw 12 is waste. Ltiter the saws have vcut entirely through the stock. as shown in Fig. 5, the segment 7() will be held firmly clamped to table 25 by the outer yoke 67 and the waste block 71 will be held firmly clamped by the inner yolze (i6 until the downwardv movement of table tirely withdrawn the saws 11 and 12 from their respective cuts, that is. until the downward movement of yoke 60 is arrested at the positionV shown in Figs. 1, 2. and 3 by the collar 63 striking its stop. The table 25 of course continuses to move downwardly after the yoke 60 has released the segment 7() and block 71.

25 has enllO reo

elf;

r lng upon the incline 82 ing the segment 70 and block 71 now lying loosely on table 25 will now be described. The horizontal shaft 42 carried by table 25 projects on the right hand side of the machine, as viewed by the operator, through a clearance slot 68 in the vertical leg yoke 60 (see Figs. 2, 3, 4 and 6). Upon this project-l ing end of shaft 42 is fixed a three-armed spider 8O having the three arms thereof arranged at 120 degress and theI three cam rollers 80a, 801) and 80C upon the ends of the arms as shown in Figs. 3 and 6. These cam rollers are arranged to ride upon the stationary cams 81 and 86 fixed upon the table guide bar 26 and upon the cam surface 82 of the swinginlg pawl 83 which is pivoted at 84 upon the guide bar 26 as clearly shown in Figs. 8 and 6) when` the shaft 42 is given a vertically reciprocating movement by table 25. YV hen the cam rollers are in the position shown in dotted lines in Fig. 6, the cam roller 80c has just descended upon the cam surface 82. As shaft 42 descends further, the roller S0c ridrotate shaft 42 through a certain angle. By the time roller 80C has run ofi' the lower tip of cam S2, the roller 8Oau has been moved to a positionvertically above the stationary cam 8l and hence further descent of shaft 42 will cause roller Sa to move down the incline 8l and thus rotate shaft 42 an additional angle. The two cams 82 and 81 together thus rotate shaft 42substantially 120 degrees, while the cam rollers 80, 80" and 8Oc follow a path of movement substantially as shown by the dot and dash lines indicated in Fig. 6. The spring-pressed plunger 5l riding upon t-he indexing cam 50 correctly locates the stationary positions of shaft 42 sol that after eachV intermittent rotation thereof a pair of stop fingers 45 will project vertically upward as shown in Fig. 5. 'Ihe operator feeds the stock in against the two vertical stop fingers 45, as described hereinabove. A positive stop means for preventing the forward rotation of the stop fingers 45 due to the thrust of the stock is provided by the cam roller 8Ob engaging the stationary vertical cam surface 86 during the upward movement of table 25. During the upward movement of table shaft 42 is also held from backward rotation by said plunger 5l pressing against one of the Hats on cam 50, as clearly shown in Fig. 5. Therefore the cam roller directly under the pawl 83 will engage the underside thereof when shaft 42 moves up and move said pawl to the dotted position shown in Fig. 6. s soon as the cam roller has cleared the pawl 83 it returns to its camming position (shown in full lines in Fig. 6) under the urge of the small tension coil spring 85. The parts will then be in proper position for vthe next downward movement of the table 25.

rotatably mounted (see In the'downward movement of table 25 one of the cam'rollers near they beginning of the down stroke. The further downward movement ofk table 25 will therefore cause the shaft 42 to begin rotatf ing, as described above, in the direction of the arrow shown in Fig. 5. The two vertical ngers 45 will therefore move out of the way and the next pair of fingers 45 will move up andengage the underside of the segment 70 and block 7l. Just beforesuch engagement however the clamping yoke releases the segment and block 7l as described above, and hence the fingers'45 when moving to the vertical position will lift the segment 7() and block 7l from the table 25 and throw them ofi the'end of the table 25 to the ril'ght as viewed in Figs. 3, 4 and 5. The segment and block will then fall upon a suitable inclined chute (not shown for the sake of clarity in the drawings) and slide to one side of the machine by gravity. Gr `of course the segment and block could be removedby any desired means such as a` conveyor belt, or by hand. As soon as the fingers 45 have moved to the vertical stopforming position the operator again feeds the piece of stock 40 against said fingers while the table 25 is ascending but before the stock engages yoke 60. The distance A Fig. 2) is made sufficiently great to enable the operator to easily do this. If desired automatic feeding means could be devised for feeding the stock forward to the proper position each time instead of the stock being fed in manually by the operator. Attention is called to the fact that in Fig. 2 the spider 80 mounted upon the projecting end of shaft 42 and the stationary cam 81. and pawl 83 have been omitted for the sake of clearness of illustration. Y j

Various modifications may be made in the machine herein illustrated and described wihtout departing from the principles ofthe invention as dened by the appended claims. For example, for certain kinds of arcuate segments it may not be necessary that the inner and outer peripheral cuts of the segments be concentric. barrel saws may be dispensed with and there will then be no waste block tobe cut oft' with each segment. However the clamping engages cam 82 at or In that case one of the means and the automatic segment-removing means may still be used to with the single barrel saw.

While the forms of embodiment of the invention as herein disclosed, constitute preferred forms, it is to be understood that other forms might be adopted, all coming within t-he scope of the claims which follow. What I claim is as follows:

l. In a machine for sawing arcuate segments from flat stock, in combination, two concentrically mounted rotaryv saws, a reciprocating table upon which the stock is great advantage placed and moved thereby against` said saws, a stop means vcarried by said table and against which one end of the stock is adapted to abut for proper location thereof in theA and automatic means for the stock is adapted to abut for proper lo- `V cation thereof in the path of the saw, and automatic means for intermittently rotating said stop means after each cut in such manner as to remove the cut off portion and to permit kvthe feeding of the stock to proper position for the succeeding cut.`

3. In a machine for sawing arcuate segments from flat stock, in combination, two concentrically mounted rotary saws, a reciprocating table upon which the stock is placed and moved thereby against said saws., a stop means carried by said table and against wnich one end of the stoel; is adapted to abut for proper location thereof in the path of the saws, a spring-pressed holding means engaged by said stock upon the movement of said table adjacent said saws whereby the stock is held rigidly positioned. upon said table when adjacent said saws, and automatic means vfor rotating said stop means after the release of said holding means to removethe cut oif portions.

4.. In a machine for. sawing arcuate segments from flat stock, in combination, two

Vconcentrically mounted rotary,` saws, a reciprocating table upon which the stock is placed and moved thereby against said saws, a stop means carried by said table and against which one end of the stock is adaptfor proper ed to abut for proper location thereof in y .the path of the saws, a spring-pressed hold ing means engaged by said stock upon the `movement of said table adjacentA said saws whereby the stock is held rigidly positioned upon' said table when adjacent said saws.- and automatic means for moving said stop means after the release of said holding means in such a manner as to remove the cut off portions and to permit the feeding of the stock to proper position for the succeeding cut. f

5. ln a machine for sawing arcuate segments from Hat stock, in combination,` two coucentrically mounted rotary saws, a re ciprocatingtable upon which the stock is placed and moved thereby against said saws, a stop means carried by `said table and against which one end of the stock is adapted to abut for proper location thereof in theA path of the saws, a spring-pressed holding means engaged by said stock upon the movement of said table adjacent said saws'whereby the stock is held rigidly positioned upon said table when adjacent said saws,.and means for moving said stop means after each cut in such a` way as to remove the cut ofi portions` G. ln a machine Vfor sawing segments from flat stoel;a in combination, a barrel rotary saw, a. reciprocating table vfor holding the stoel: and moving the same against said saw, stop means carried by said table and against which one end of the stop is adapted to abut location thereof inthe path of said saw, and means for moving said stop means after each cut in such way as to remove the cut olf portion of the stock and to stop at a normal stop-forming position. ln testimony whereof I hereto alix my signature.

JOHN W. LEE. 

